looking at the 7 in cells r1c127, r7c27, r2c2
finned x-wing with r1c1 as fin removes r2c2
finned x-wing with r2c2 as fin removes r1c1
ER with the 7s in b1 will remove r1c7
All of them leave stte and solve the puzzle

One pattern 3 solutions

Last edited by arkietech on Mon Sep 17, 2012 10:36 pm; edited 1 time in total

Trying this potential DP on 78, which some call BUG Lite. There are five possibilities. The 1s in band 1 set r1c7<>1. The 1s in band 3 set r9c9<>1. So with r1c7 and r9c9=7, r7c7<>7=8. The other possibility is 5 in r2c5 which proves 8 in r8c5; r8c7<>8.